Unlicensed Band Resource Reselection After Channel Sensing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource re-evaluation and pre-emption procedures in unlicensed bands, leading to inefficiencies and potential conflicts in channel access.
Innovation Solution
A method and device for performing channel sensing and determining whether to trigger re-evaluation or pre-emption procedures for wireless communication resources, ensuring that resources with non-ideal channel sensing results are not delivered to the medium access control layer, and allowing for resource reselection based on these procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel sensing is performed for all resources including those with non-ideal results, then resource allocation completeness is improved, but channel access conflicts and system inefficiency worsen
Solution Approach 1:
The patent applies preliminary action by performing channel sensing before resource allocation and identifying resources with non-ideal sensing results in advance. This allows the system to pre-determine which resources should be excluded from the MAC layer, preventing potential conflicts before they occur and improving overall channel access efficiency while maintaining reliable resource allocation.
2Quantity of substance
If resources with non-ideal channel sensing results are delivered to MAC layer, then resource availability is improved, but channel access conflicts worsen
Solution Approach 1:
The patent applies the taking out principle by extracting resources with non-ideal channel sensing results from the resource pool before delivery to the MAC layer. This separation ensures that only resources with ideal sensing results are delivered to the MAC layer, thereby maintaining resource availability while eliminating the harmful factor of channel access conflicts associated with non-ideal resources.
3Productivity
If re-evaluation and pre-emption procedures are triggered for all resources, then resource optimization is improved, but processing complexity and overhead worsen
Solution Approach 1:
The patent applies local quality by applying re-evaluation and pre-emption procedures selectively only to resources with ideal channel sensing results, rather than uniformly to all resources. This localized approach optimizes resource allocation where it matters most while reducing unnecessary processing overhead and complexity for resources that are already suitable for allocation.
Data Source
AI summary
Proposed is an operation method of a first device (100) in a wireless communication system. The method may comprise the steps of: acquiring information related to one or more first resources; carrying out channel sensing for a channel access procedure (CAP) related to the one or more first resources; and determining whether to trigger a reevaluation procedure or preemption procedure related to the one or more first resources, wherein the reevaluation or preemption of a resource, among the one or more first resources, for which the result of channel sensing for the related CAP is not idle is not transferred to a medium access control (MAC) layer.